Sluice gate



Marc 31, 1936.

F. w. PEILERT SLUICE GATE Filed Aug. 10, 1954 .2 Sheets-Sheet l March 31, 1936. w PEILERT 2,035,833

SLUICE GATE Filed Aug. 10, 1934 2 SheetsSheet 2 Fig.4

fkiromcH M4 fis/LEAT Patented Mar. 31 I936 PATENT EFIE SLUICE GATE many Application August 10, 1934, Serial No. 739,315 In Germany August 12, 1933 1 Claim.

It is usual to provide upwardly movable sluicegates with two girders, which extend horizontally and parallel to each other, to receive the water pressure, and to arrange these girders in such a 6 manner that they are uniformly loaded. In the case of small heads of water, or in the case of the employment of damrning hinged portions, the lower girder comes very low; furthermore in the case of very large openings of the sluice-gate the girders are given a large width in order that there may be as little bending of the sluice-gate as possible. In this case the girders project far over the water on the down-stream side of the gate.

In order to prevent the occurrence of a too powerful whirlpool action when the water is let through by raising the sluice-gate, the sill or floor hollow is generally so formed that the kinetic energy of the water passing through is to a considerable extent counteracted by the formation of water rollers. These water rollers are formed in the immediate neighbourhood of the sluicegate, so that in the case of sluice-gates with a low girder, which moreover in the case of large openings projects far over the down-stream water, the water rollers strike the down-stream transverse member of the lower girder. This mischief occurs notably when the down-stream water level is high and the sluice-gate is only slightly displaced.

It has further been found that the sluice-gates in certain positions, which depend chiefly on the strength of the stream of water passing through and on the height of the down-stream water level, are by the impact of the water rollers put into such vigorous oscillation that it is not practicable for the sluice-gates to remain long in these positions, even if the said positions correspond to the amounts of flow necessary for the time being.

In the case of a known upwardly movable 40 sluice-gate the two down-stream transverse members of the girders for transferring the water pressure to the running rollers are combined into one transverse member so that a triangular crosssection results for the supporting frame. By this means it is true the disadvantage first mentioned is avoided, but it is unsatisfactory in that the vertical connection existing between the downstream transverse members, in the case of the older constructions, in which the two girders for the reception and transference of the water pressure are arranged horizontally, is entirely omitted. As this connection is of the greatest importance, not only for receiving the weight of the sluice-gate but also for resisting the forces that are liberated by the overflow of the water,

and for this reason ought to be maintained, it is advantageous to place the transverse member of the lower girder only so high as is necessary for avoiding the impact of the water rollers and the occurrence of oscillations in accordance with the conditions for the time being, so that a vertical connection can still be provided between the two transvsrese members of the girders. The invention resides in this formation of the sluice-gate.

The essential form of an upwardly movable sluice-gate so obtained will satisfy all requirements. As compared with the pure triangular form it presents greater resistance to bending, and especially facilitates the construction and installation; in addition the jamb recesses and consequently the jambs themselves can be made of smaller dimensions than in the case of a sluicegate of triangular form.

Several constructional forms of the subjectmatter of the invention are shown in the drawings by way of example:

Figure 1 shows an upwardly movable sluicegate without a swinging flap,

Figure 2 an upwardly movable sluice-gate with a swinging flap mounted upon the gate, and

Figure 3 a downwardly movable sluice-gate, all in the damming position.

Figure 4 shows a device for operating by means of a rack an upwardly movable sluice-gate pro vided with a swinging flap, and

Figure 5 shows a device for operating the same sluice-gate by means of a chain.

In each of the sluice gates shown there is a lower girder t, 5, or 6 and an upper girder l8, ll, or l2; these girders being in the form of trusses, in which the long members run transverse to the stream and the cross members up and down stream. The transverse member I in Figure 1, 2 in Figure 2 and 3 of the lower girder 4, 5 or 5 is raised in a way known per so on the down-stream side. In contradistinction to the known sluice-gates of this kind, in which the transverse member of upper girder is lowered in the down-stream direction to such an extent that it forms a triangulated structure with the transverse member of the lower girder, according to the invention the relative arrangement of the lower transverse member 2, or 3 and the upper transverse member I, 8, or 9 of the upper girder Ill, II, or [2 is such that a vertical connection l3, i l, or [5 can still be provided between the two transverse members. In this way there are obtained the advantages mentioned in the introduction.

til

I claim:

A vertically movable sluice gate comprising an upper girder and a lower girder, each girder comprising spaced members running transversely of the stream joined by cross members, the downstream transverse members of the two girders being at a distance one above the other and joined by vertical connections, the lower girder being inclined upwardly in the downstream direction.

FRIEDRICH WILI-IELM PEILERT. 

